# Mathematics – Stage 1 – Year A – Unit 9

This sample Stage 1 unit explores the big idea of combining and separating quantities.

Mathematics K-2 Syllabus © 2021 NSW Education Standards Authority (NESA) for and on behalf of the Crown in right of the State of New South Wales.

Students are provided with opportunities to:

• represent combining situations in different ways through the use of gesture, enactment, drawings, numbers, and words
• use symbols to describe mathematical quantities, actions, and relationships in efficient ways
• understand that the order in which 2 quantities are combined does not change the result

## Syllabus focus and content group

### Stage 1

##### Representing whole numbers A – MAO-WM-01, MA1-RWN-01, MA1-RWN-02
• Use counting sequences of ones with two-digit numbers and beyond
• Continue and create number patterns
• Represent numbers on a line
##### Combining and separating quantities A – MAO-WM-01, MA1-CSQ-01
• Use flexible strategies to solve addition and subtraction problems
• Represent equality
##### Combining and separating quantities B – MAO-WM-01, MA1-CSQ-01
• Use knowledge of equality to solve related problems
##### Forming groups A – MAO-WM-01, MA1-FG-01
• Count in multiples using rhythmic and skip counting
• Model and use equal groups of objects to represent multiplication
##### Forming groups B – MAO-WM-01, MA1-FG-01
• Represent and explain multiplication as the combining of equal groups
##### Non-spatial measure A– MAO-WM-01, MA1-NSM-01
• Mass: Investigate mass using an equal-arm balance
##### Non-spatial measure B– MAO-WM-01, MA1-NSM-01
• Mass: Compare the masses of objects using an equal-arm balance